Ships – Hull or hull adjunct employing fluid dynamic forces to... – Having hydrofoil
Patent
1995-10-18
1997-12-23
Swinehart, Edwin L.
Ships
Hull or hull adjunct employing fluid dynamic forces to...
Having hydrofoil
73187, 440 89, 114283, B63B 3500
Patent
active
056997493
ABSTRACT:
A personal watercraft exhaust system, hull underplate, and speed sensor and sponson arrangement. The exhaust system for the engine provides a compact assembly that incorporates a pair of expansion chamber devices on opposite sides of the tunnel to provide a water-trap effect, effective silencing, and still clear storage compartments of the hull. The sponsons are configured so as to improve the buoyancy and provide stability upon leaning, and the underplate mounts a speed sensor to the rear of but below the jet propulsion unit discharge so as to provide a good speed signal and to protect the speed sensor.
REFERENCES:
patent: 4694770 (1987-09-01), Kitner et al.
patent: 5007870 (1991-04-01), Okubo et al.
patent: 5050517 (1991-09-01), Kobayashi
patent: 5244425 (1993-09-01), Tasaki et al.
patent: 5369360 (1994-11-01), Amyot
patent: 5433635 (1995-07-01), Kobayashi
Hirano Mitsuhisa
Kojima Yasukazu
Yamada Hisato
Swinehart Edwin L.
Yamaha Hatsudoki Kabushiki Kaisha
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